T2150 Series
1.9 Power Supply
The power supply provides five kinds of voltages to the T2150 series system board. The
T2150 series power supply has one microprocessor and it operates at 500 KHz. It contains
the following functions:
1. Determines if the AC cord or battery is connected to the computer.
2. Detects DC output and circuit malfunctions.
3. Controls the LED indicator and speaker.
4. Turns the battery charging system on and off and detects a fully charged battery.
5. Determines if the power can be turned on and off.
6. Provides more accurate detection of a low battery.
7. Calculates the remaining battery capacity.
The power supply output rating is specified in table 1-8.
Table 1-8 Power supply output rating
DC Regulation Maximum
Use for Name voltage tolerance current Ripple
(V) (%) (mA) (mV)
System logic, FDD, HDD, VCC +5 ±5 1,400 100
Display
PCMCIA, Flash ROM P12V +12 ±5 100 240
CPU, GA B3V +3.3 ±5 1,100 60
VRAM, GA, RAM B5V +4.7 ±5 650 100
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